Mechanical stoker.



J. P. DAVIES. MECHANICAL STOKER.

APPLICATION FILED NOV. 18, ll'i'n 1,025,788.

Patented May 7, 1912 B SHEETS-SHEET 1.

J; P. DAVIES. MECHANICAL STOKER.

v; APPLICATION FILED NOV.18,1910 1,U25,788.

Patented May 7, 1912.

6 SHEETSSHEET 2.

J. P. DAVIES. MECHANICAL STOKER.

APPLICATION FILED NOV.16, 1910 1,025,788, Patemea May 7, 1912.

6 SHEETS SHEBTB 5 alwmdo'a Giro-(mu,

J. P. DAVIES. MECHANICAL STOKER. APPLICATION FILED NOV. 18, m0.

Patented May 7, 1912.

6 SHEETS SHEET 4.

J. P. DAVIES. MECHANIQAL STOKER. APPLICATION rum) NOV.18, 1910.

Patented May 7, 1912.

6 SHEETS-SHEET 5v J. P. DAVIES.

MEGHANIGAL STOKEB.

APPLICATION FILED NOV. 18, 1910.

1,025,788. Patented May 7, 1912.

6 SHEETS-SHEET 6 sTATEs PATENT OFFICE mmmv I. lmvms, or CiLbi'CINNATI, 01110.

To (ill 'mayjc oncern:

B it known th I in vntion stoliersyand "preferably,

" fur :icesto which p'airsfand o provide "a .1 shall be simple of and'fi-eliicient'in'use an a and; movable-grate ba have sueh a relative th -sec res; positiv the-fiielaw of the @rat med :1 id feeder 'hargii 1;; the

pauying drawings,

cap bleof being remove ma-in object. oi vt or object- :of, ra te: bars .jwhich e is 1nd removed: as 011 havefla 'self-elea provided w ith 'ma csteani between them an on; w re y h r cl? 1 of combustion thorough co u'el there will kep I n the disintegratio "0 n thepprod act's, viii"? '11 more. gigs of-the f'ueh FAstill furthe-rob provide irnproved j mechanism by which an Q iteciproc'at'ory fine 7 and-{to genera i and. increase the. general .ieney of a pparattis "of this class; 7 a h'thcse and;pther iobjeets'in.,view, the invention consists offthe features of 'con.

"struet-ion; combination and MEC ANICAL 'YSTOKER.

specification of Letters Patent. Application filed Rove a131, JENIiIN P. United States, the county of Ha have i invented ne m roven entst in Me the following is mech' int-rollahle'to vary-the ektent toprovide nlo'vel' in which c "DAvIEs; residing at m'ilton' and w and usechani'cal St'okers, a specification.

relates tol' 'Inechanical necessaril oi-table; stokers of with at kind having gfrs; esavvhich ifornr the,

frqrit-ewalls 0f the they areap'plied and are I d bodily for cleanhe-present invention anieal stoker which construetidn and reliable d in whiehthe fixed rs ame so erel'atd and reciprocating fihotio'n e and {constant l nid ie tliegrate; whereby e at any I point will be ft-he invention is to *t i lzbgmfl "al ow -requires;

ject of the invention is to operating and controlling. [even and regulated tion of the. movable grate bars'niay'ebe attained and tli'eir-eXtent-of ino- ,to provide a reliable non-ch01- ismthereof motion means for lies and dumpin the. .resi

lly simplify anti. improve arrangement of fully described and being-had to the accom- Patented May 1912.

Figure 1 is a side elevation of a mechanical stoker embodying my invention. Fig. 2 is a front elevation of the same, the inlet away. Fig. 3 is a top plan view of-thea j 'llustrate the construction. tical longitudinal section on F ig. 3. F i'g. 5 is fragmentary vertical transverse sect-ion on the line; 5 5jof Fig. 4. Fig.6 is an enlarged detail view in: side ele- "vation of a portion of the grate, iith parts vbroken away, showing adjacent fixed and 3 movable grate sections. Fig. 7 is at section throughcone of the grate sections. ja fragmentary top plan View of. the same. "Fig. 9 is ,a perspective view'of' oiie of the grate bars, Fig.v is a side viewoi' the mechanism for operating the feeder.

Fig. i is a verdesignates the frame of theapparatus, which includes a pair of spaced u'pil'gi 'it front. plates 2 extending edgeivise 'i'nlj a' direction .ti-ansverselyf of the longitudin frame, a-pair of standards, secured to the outer -surfa'cesof is id and extending ed geiv'ise in the tlleilongitudinal line of theqfr tal; base bars 01j S illS.=l extendl Ironr the lower ends of the plates 5 incliningdownwardlyand at annngle'of about'45 fro n'apoii the upperendslo-fthe plates 2 to t inwardly and :which parts are frame is preferably mounted on rollers 6 so that it maybe rolled into and out of the Open front of a furnace, the upright portion of the frame structure, when the apparatus is applied for use, forming the front wall of the furnace. The frameproper is completed by a hopper 7 extending transversely-across and secured to the upperfen'ds of the plates 2 and standards 3 and tying said'parts together. Below the hopper and between the side plates and standards the frame is open for'a full and. effective feed of air to the V grate. I The base of the hopp'er-lis, formed to provide a chamber 8, and the inner Wall of the hopper is provided with a discharge pening 9 communicating with the inner end of said chamber; Extending inwardly from the bottom of the chamber is a deliver} shelf 10 hi1 ving a downwardly bent portion 11. A

ends ofthe main steam pipes being broken jparatus with parts broken away better Fig. .8

.i Referring to the drawings,'the numeral 1 QQand sidepreferablyv made of angle metal firmly bolted 0r riveted together. The Y the line Of portions thereof to the action ofthe flames,

feeder 12 is arranged to reciprocate back and forth in the chamber 8 and through the opening 9. The upper surface of 'the forward endof this feeder is depressed below the plane of the upper surface of the rear end thereof to leavesutlicient space above it in the opening 9 for the free discharge of the coal, and to form a ledge or shoulder 13 to force the coal through said opening. The shoulder and inner end ofthe feeder thus act to slide-the dropping coal off the shelf onto the upper endof the inclined grate l hthe construction of which I will now proceed to describe.

As shown, the grate is supported hythe side bars 5, inclines downwardly and forwardly at a corresponding angle thereto and is stepped to facilitate the feed of the coal and its turning over or agitation in its course of travel. for the free passage of air therethrough and the presentation of all whereby combustion is promoted. The grate. consistsof alternately arranged stationary and movable .or reciprocating sections, the stationary sections 15 being directly mounted upon the side bars 5 while the movable sections 16 are mounted uponparallel pairs of upper and lower carrier bars 17 and 18 provided with track flanges 19 resting upon rollers 20 journalcd on stub shafts 1- carried by the respective sidebars, the said movable grate sections being arranged in upper and lower series mounted on the upper and lower carrier bars, respectively, and reclprocated in opposite directions in,

. the'operationof the appa ratus.- The grate sections 15 and 16 support and feed the burning bed of fuel and, with certainexceptions, are similar in construction, each consisting of a plate 22 formed upon a body portion 23 preferably having depending -spaced longitudinal flanges 24 to give sufficient weight and strength thereto, said body portion beingof less Wldtltfllflfl the plate. ,The ,plate is provided at regular intervals with transverse slots 25 extending through the pro ecting edges thereof and through its center down to the body portion .2-3, the forward ends of the respective slots' being flared, as indicated at '26. Between the slots the plate formed with feed grooves 27 communicating at their inner ends through duets with-a. longitudinal steam channel. -29 formed in the body portion 23,, with which con'nnunicates a branch steam supply pipe 30, the grooves extending from said ducts to and through the forward edge of the plate and gradually increasing in depth, as shown.

Each plate 22 carries a series of grate bars equal-in number to the; slots 25., each bar embodying an upper or main arm 27 and a lower downwardly and forwardly projecting arm 28', arranged below the plane of said main. arm and connected with the from the plate,

relation tothe arms 27' on its passage,

lower front portion thereof by an ofi'setQQ'. The arm n7 is coextensive in length with the width of the plate 22 to which it .is applied, while the arm 28 is adapted to extend over upon the plate 22 of the next adjacent lower grate section and is sub-' stantially coextensive in length with the width thereof, the arms of eaclrbar being preferably-tapered between their upper and lower edge to facilitate-the gravital feed of the fuel between adjacent bars. Theotfset 29 has a beveled or thickened portion-:80, to fit within the flared portion 26-of the slot'25 andthe lower edge of the arm 27" is adapted to fit within the body of the slot and is formed with a recess 31 to receive and engage the upper surface' of the body portion 23 and with front and rear shoulders 32- and 33 to bear against the front and rear edges of the said body portion,'where by the grate bar will be held from both lateral and longitudinal displacement. In] orderto prevent possibility of displace; ment of the bar undertheimpact of the moving mass of coal, the shoulder is provided with lateral otfsetsilfi to engage under the rear portion of the'plate at opposite sides of the slot when the bar. is fitted in position, thus obviating any possibility of accidental disengagement of the bar while permitting said bar to .be applied and removed in a convenient manner. In applying each grate bar, the

intermediate portion of the wall of the recess 31 is first fitted in the rear portion of;

the slot 25 while the bar is held at an upward and forward angle and the bar then drawnforward and its forward end depressed to bring the shoulders and beveled surfaces v30 into "locking position. Through u reverse movement of t-he'bar, said bar may be readily detachcd in the operation of cleaning the grate or substituting a new bar therefor.

Ihe arms 28 of the bars of thefixedgrate sections overhang the plates .of the next adjacent lower movable grate sections on lines between the arms 27' of the bars of the latter and in alternation therewith, while the arms 28 of the bars ofthe movable grate sections are correspondingly arranged with of the bars of the next adjacent lowerstationary grate sections, forming a continuous grated surface for the support of the fuel, the upstanding portions of which overlap on alternating,

lines for the free passage of the fuel from one grate section to the other and the coin stant turning over or agitation nf the fuel by which all surfaces of the traveling bed of fuel will be exposed for consumption, whereby thorough ombustion and the utilization of all of the available combustible portions of the fuel'will be in sured. This action is further promoted by the gra vital travel of the fuel down the inclincd grate and the reverse reciprocatory motions of the upper and lower series of i'novable grate sections, by which a relative opening and closing motion between the stationary and movable grate sections is established whereby the bars of the grate sections are caused to work in opposite directions between each other and to automatically and alternately loosen up and turn over the coal and shift it from secton' to section downwardly on its forward feed. The arms 28 of one grate section overhang the feed grooves 27 of the underlying grate section. through which jets of steam are constantly supplied to stir up and free the particles of coal between the arms of the grate bars, such arms 28 thus acting as valves and deflectors to spread the of steam laterally and cause the same to pass upwardly through the spaces between said arms and the arms 27" of the said underlying grate section, whereby an effective agitation of the fuel is obtained. The jets of steam supplied in such manner further serve to oxygenate the products of combustion and facilitate their consumptiomto cool the surfaces of the grate sections and; diminish the liability of disintegration by. heat, and to effect the breaking up of clink-' ers and other incombustible particles of the fuel, reducing to a great extent liability of choking of the grate sections. The ends of the plates of the stationary grate sections are provided with cast flanges which closcthe channels thereof and are adapted tp rest upon stepped supporting surfaces 36 on the bars 5, said flanges having dependin lugs 37 to fit within seat recesses 38 'in said bars and flanged arms 39 to bear against the inner surfaces of the bars, whereby said grate sections are held from casual displacement. The ends of the plates of the movable grate sections are formed with similar flanges having depending shanks 40 secured to the bars 17 or 18, as the case may be.

vThe construction of the fuel-s11 porting portion of the grate is that dbscribed throughout except at the extreme upper end of the grate, where movable grate bars 41 which are straight throughout are provided for cooperation with the underlying movable grate section, said bars being otherwise constructed as before described for interlocking engagement with a slotted transverse, flanged supporting rail 42 disposed beneath the shelf 10 and connected with the upper carrier bars 17 for reciprocation with the upper series of movable grate sections. At the base of the grate frame I provide a dumping grate section 43 having eccentrically disposed trunnions 44 journaled in bearings formed in upturned extensions 45 of the inner ends of the,sills 4, the outer side of said grate section being heavier to drop by gravity and dump the ashes and remaimng unconsumed products of combustion into the ash pit when such grate section is released for tilting movement. This grate section is normally disposed in a horizontal position. and extending upwardly between the bars on its dumping side are stationary rake bars 46 fixed to a cross piece 47 extending between the sills, said rake bars .operating to loosen and free the clinkers and ashes and permit ready motion of the grate section and deposit of the clinkers and ashes into the ash pit. Connected with the said grate section is a crank arm 48 pivotally coupled to an operating rod 49 extendin outwardly through the open front of the apparatus and adapted to be engaged with a latch member 50 upon the frame structure to hold the grate in normal position. Upon releasing and shoving the rod inwardly the grate section will be tilted to dump its load. The lower ends of the carrier bars 18 are bent at an intermediate angle between the horizontal and 45 angle of the fuel-supporting grate to form supporting'membe'rs 51 for an intermediate grate section 52 arranged between the dumping grate 43 and the lower section of the inclined fuel supporting grate to finally separate the ashes and clinkers from the fuel prior to its passage to the final or dumping grate section. This intermediate grate section consists of alternately arranged stationary and reciprocating bars 53 and 54, the bars 53 being secured to cross pieces 55 extending between the frame pieces 5 and the bars 54 to cross pieces 56 secured to the supports 51. In the operation of the grate the particles of fuel falling upon the grate section 52 are agitated by the relative reciprocating motion between the grate bars thereof, whereby the ashes and small clinkers and unconsumed portions of fuel are separated from the larger clinkers and unconsumed portions of the fuel and allowed to drop into the ash pit.

The mechanism employed for reciprocating the feeder and movable grate sections preferably com rises a steam or other fluid pressure cylindzar 57, having suitable admission and exhaust ports and valve mechanism for the supply and exhaust of steam to and from the opposite ends thereof. Operating in said cylinder is a iston 58 movable in reverse directions by. uid pressure, the rod 59 of which extends outwardly through stufling boxes in the upper and lower ends of said cylinder, the lower end of the rod being connected with'a cross head 60 traversing a suitable guide 61, all of the parts of the o crating mechanism above described and to e described being'supported upon the front portion of the rame structure. The upper end of therod 59 is connected with the rod 62 of a piston 63 movable in tluiil. The body of llttltl in the cylinder 64,

Eat)

through it. resist-alive to the movement of the piston tl l in either direction, regulates the motion of the piston .35? and pretents the lattet'riaiiietl llix't't) from moving un evenl or abruptly untler fluctuati ns of steam IHTHHLIP. by whi sh an even and regulaterl motion of the power piston is attained at all times to v ti enre a corresponding evenmess of motion of the feeder and movable grate sections operated therefrom. Journaietl on the trout of the frame is a rot-l; ahat't (3T prtoi letl with a (rank arm W eon neetetl by a link (1?! with the (M ss heatl (it). (it \rhieh exhal't' in als a Yorker lever having oppositely extending arms to whirl) are pivoted the loii'er enzla ot' the links 71 of a parallel motion ineehauisni said links being nnit-ally eoupletl at their upper" entls to a .Ot'lUl arm TI: hav ing' on one ltlt of its renter a longitrulinal alot, Tllvin Whieh is '--'litlabl lltttlltllttl a blo rk T t rewiring a (rank pin 75 on the outer or tree entl of a erank arm 7 attarhe l t a FtH'Uhtl tran e \t'rse rot-k shalt. YT, the eon truetion being \ueh that upon the opposite motions ot the power piaton the links \\'lll be altta'iiat'elv re eiproeatetl in reverse (llltOliotls up :llltl (town tlln'l transmit motion to the rot'lter arm 7'2. \Vhen the blur-k is arranged at the inner en l oi the slot 73. it is tlingosetl on eenter at a point equirtiat'antly between the links. so that in :urh arrangement antler the motion of the liulrx the blotk arul arm \Cill simplvtilt on the wrist pin 7: Without trait ftl'l'llrfl motion to the arm Tti. An atlius't Ll'lfl whereby the latter may be lll(l\'\tl outn'artl in the slot 7?) to a llt nltlt ll ll(\' )lltl renter. so that the r t-king motion of the arm 3'2 \rilt ilt'ilmlillt a eorrwpomling: motion to the arm Ft, to ro.:l.' the Hlliil'l T7 to greater or lt': tlegrrw a rt'irtlingr to the extent ot outwartl adjustment ol' the liloek. The hat t ii rat ries at ea h ria a rocker text-r Ttr ll;t\tll1' no war li amt lorcn\ r-:tl v extmnling; arms. to whit-n arms the earri r haw oi the upper am lorri- --eries ot in ahle gg'ratt- -.eetion are respt tirt-ly e nnreietl i t' link F t amt arm R4 having a lungitutlinal slot 83 on one bltltl of it: center. ln this slot $3 slitlably l mountetl a block tit} Carried by a wrist pin srrew TR vis onnertetl with the blot-k;

(T will n ll fillf-l lltlttl to httlt grat t-tiona l to reta n-ovate tluwine in n u ite tlirer tionav n the mu --ite entl ot the lttll i ('1'? from the a a U- aml lever Tl it a ham M aimiiar l 1- the links hi1 ol' another imrallel t l tltilt 87 on the lower (Iltl of a inp tting link 88 eonneetetl at its upper entl by a crank arm 89 with a tlllltl tranrveixe rock shaft 90,

whit-h shaft is proritletl with crank arms 91 pivotally engaging recesses in the feeder 12, hereby the rorking: motion f Sttltl shaft 30 Will'be transmittetl to the i 'tittltl" it will. of eourse, be llIi(l(!1 ttiO(l that through this eeeont parallel nuriion metrhaniam jrst tlQ- St'rllfltl the teetler may l e thrown out of operation while the gamer inechanian'i remains in action amt itr- -t roke/ or degree of reei it-oratory motion regulated to aetord with the stroke of the movable grate sections to teetl the proper amount of fuel to the grate, It will alw be llllt lolhit itl that as he feeiler operating; ineelnmism reoehea power from the mine sourte aa the grate opmating meehaniam an e en and regulated 't'eetl motion will also be seeuretl. The braneh v\team upply pipea 3O Wltlt'll aupply steam to the elianneh 529 of the stationary anti movable grate et'tions preferably ex teml lateralh bel w Hztltl grate Hfli'lltlna towartl opposite Fitles of the frame, where they are eonnet'tet-l with main steam supply pipes atlaptetl to be eonneete l at their upper entls to any suitable Stltlt't'v oi steam \upply. (not shownl. The pipe; 92 extend ltuigitutlinally along the aitlea (it the frame aml by reason of their angular tllSPHSltiOtl to the horiz ntal lines on which the movable grate seetiona reeiproeate are adapted to heml or flex suttieiently to permit sueh reeiproeating' motion 'n'itlnut injury.

From the foregoing tleseriptiorn taken in ronnet-tion with the aeeonnninying (lrawinns. the roiw ruetion and mode of operation of my llltt l'tnttl automatie xtoker will he reatlil untleixtoo-l'lamt 3e advantages appreriatetl without further tlest-ription.

It will he \HttlCl'rt 'lOtl that while l have v hotin in the present instance the embodiment ot the invei'ition in a portable Stoker, it i\. ot' vourse apparent that the same, prin- (llilth of r-netrmi'i n may be enn vloyetl in a ttolter forming a Stationary part: of the turna o aitlt hem-e. the intention is not lltittterl in this partieular.

Hating thus tleseribetl my invention, I lav- ,2 m rhanie l tuhot' mehnlitnj: an in- 'linetl grate enihmtyixn atationary antl re- "lti!'t t;lt()i axe eel tin haring! g1 ate bars rut-her 5 a rorker l the t {operate hemeen the gra e hare: thereof hen n hu'h are onnt-etetl t e bower entli i titl i eiproratory mate wotions are reeip Fut'tlltt mtitl ru-iproeator grate sections be ng \Ulfiltft'ltftl in seriea above and below ranm rae enter at the grate, and means 1 :1" aimnltancously reciprocating one of the c oi rcciprocatory grate sections in one iil'i't'llliii and the other series of reciproiat -rv grate se tions in the opposite direcion.

mechanical stoker comprising a. I me. a. rccipro atory feeder, an incl ned if iltv embodying stationary and reciprocaiorv mate sections having grate bars exnadir transversely thereof, the bars of tll 'll cru section being arranged to overlap the amt adjacent grate section and to operataern the grate bars thereof when r. v git-oratory grate sections are recipro- 1 'd. said reciprncatory grate sections be- ;r: ""nL-wted in series above and below the center of the grate. and means neously reciprocating the feeder oi the s s of rcciprocatory grate tit one d :cction and the other series ratory grate sections in the oppom ion A mechanical stoker comprising a L: $.21 inclined fuel grate embodying 2):; culinary and movable sections, said movwilmis being connected in series above Hot the transverse center of the grate, J'itfi' tut supplying fuel at the upper end mate. a horizontal dumping grate sifting grate section composed of fixed and movable bars and ar anged aetween said dumping grate section and the lower end of the fuel grate, and l izczms tor operating the feeder and simull r:'- reciprocating the upper and lower it movable fuel grate sections in opi'ectiOns said movable bars of said grate section being connected for ht with said lower series of movable ".u sections. n a mechanical stoker, an inclined Z av" rol'nprising alternately arranged sta and movable grate sections, said seci mg;- arranged in stepped relation and m n pr ided with grate bars having exteni r: rim-Mapping the next adjacent lower e -Jim i": operate brtween the grate bars n-Tron "ll-3r: said movable grate sections :rocatcd, and mechanism for recip- 7 said movable grate sections.

a. mechanical. stoker, an inclined comm-hing alternately arranged staand movable grate sections. said seca-ing arranged in stepped relation embodying a body portion protions an earn til"! with, a plurality of grate bars de connected therewith and having e nm arranged to overlap the next adtower sections to operate between 541 thereon when said, movable grate swftinns are reciprocated, and mechanism reciprocating said movable grate sec in a mechanical Stoker. an inclined comprising alternately v ranged stationary and movable grate sections. said sections being disposed in stepped relation and each embodying a body portion hav-' ing a plurality of spaced bars detachably connected therewith and provided with extensions overlapping the body portion of the next adjacent lower section to operate between the bars thereon when said movable grate sections are reciprocated. and mechanism for reciprocating some of the movable grate sections in one direction and others in the reverse direction.

7.111 a mechanical stoker, an inclined grate comprising alternately arranged stationary and movable sections disposed in stepped relationshi and each comprising a body provided wit a plurality of spaced transverse bars, the bars of each section having extension arms overlapping the body of the adjacent lower section and alternating in arrangement; with the bars thereon to operate between the same when said movable grate sections are reciprocated, and mechanism for reciprocating some of the movable grate sections in one direction and others in the reverse direction.

In a mechanical stoker, an inclined grate comprising alternately arranged stationary and movable sections disposed in stepped relation and each embodying a substantally fiat fuel-supporting surface having npstanding bars provided with extensions ott'set below the plane of said surface and extending downwardly over the surfaces of the adjacent lower sections to operate between the bars thereon when said movable grate sections are reciprocated, and mechanism for reciprocating the movable grate sections.

9; In a mechanical stoker, an inclined grate comprising alternately arranged stationary and movable sections disposed in stepped relation, each section comprising a body plate having slots therein and grate bars having upper arms fitting in said slots and interlocking with the plate and lower arms ofl'set below the plane of said upper arms and extending over the next adjacent lower grate section to operate between the upper arms thereof when said movable grate sections are reciprocated, and means for rcciprocating said movable grate sections 10. In a mechanical stokcr. an in -lined grate comprising alternatet arranged sta tionary and movable sections. ea h comprising a body portion having a plurality of transverse slots and carrying bars provided with upper arms extendin across said body portion and fitted in the slots and interlocked with the body portion and provided with lower arms offset to extend over the next adjacent grate section and between the upper arms of the bars thereof when said movable grate sections are rec procated, and means for reciprocating some of the movprising :ll' t'lltliLly able grate s ctions in one direction and others in the reverse direction.

-11. In a mechanical Stoker, an inclined grate comprising alternately arranged sta tionary and movable sections carrying bars disposed in stepped relation. the bars of one section projecting over the next succeeding section to operate between the bars thereon when said movable grate sections are reciprooated, means connecting the movable sections in series above and below the trans verse center of the grate. and means for simultaneously reciprocating the upper and lower series of movable bars in opposite directions.

l2. In a mechanical stoker. a grate comarranged Fi:lil(lll2ll' and movable FitPtlOlh. each section comprising a body having a steam channel, transwr c groovcs in thc uppcr face of the body coin inunicating with said channel and gratc bars between the grooves, the bars of each grate section having extensions pro iccting above the grooves ot' the next adjacent gratc 1 section, and int-ans for n'iovablc grate Htt'tltiHH.

l3. Tn a mechanical stolter. a grate comprising altcrnatctv arranged tationary and movable section. each scctiou comprising a body having a steam channel, transverse Uroovcs in the uppcr t'acc of the body coininunicating with said channel and grate bars bctivccn thc groovw. the ars ot cach gratc section having cvtcn ions proi ting above the groovc of thc ncxt ad' recipr cating said accnt grate Stt. tiou stcain supply pipcs arranga d below the grate and conununicating with said channcls, nit-aw c unt-cling thc movable grate scctions in scrics. and means for reciprocatingthc tl'itfv ot' inovablegraic sco tions in pp --itc directions.

14. in a nic banical stokcr. a grate con prisirw alternately arrang d stationary and movable cction vitlcd \vli'b ba and stcam tccd'groovcs bccach ection being proi i l l l l l t l t t i twccn thc bars and gradually increasing in i dcpth t uard thcir outer ends, thc bars oi carh secti n having extension bars overlying thc lttltlt teed grooves of an adja ent section and controlling the feed of steam through said grooves. and incans't'or rociplocating the movable grate sections.

to. In a incchanical stoke-r, an inclined Qratc comprising altcrnatcly arranged stationary and movable scctiims disposed in tcppcd t'clatiol). a b ecction hai ing trans- \cr: c gratt bare and stcain inlct bctu'cr-n thc wmuu said bars bring providcd \v tli cv t nsi na projecting hctivccn thc transrcrso gratc bars ol' the ncxt adjacent lower sow ti n and cont olling the st am inlets thcrcin. and nicans tor reciprocating staid m vable grate sections.

I". In a nicchanical stoltcr. the combina tion, with a feeder. of an in lined main grate having stationarr clutling movable secti ns. a

' a rock shall. a pair of rocker grate including a frame. a horizontal itinnping section having spaced bars and piv ted to tilt vert cally, a horizontal intermediate grate between the inclined grate and dumping section. said main and intermediate and reciprocating sections. means for reciprocating said retrigr rocating scctions ot' the main and interm diate grates. and ting'cw tixed to the frame at a point. between the intermediate grate and dumping section and inclining up wardly between the bars of said dumping section.

17. In a mechanical Stoker, a stepped. inclined tuel upporting grate composed ell altcrnatcli arrangcd stationary and reciprocating cctions. ea h of said sections having: vgratc ltitlw overlapping thc next adjacent l-nvcr :-(t'lltill and w rking between the bars thcrcot'. nicans connccting the rcci 'nocating ttti it'N oi" the l'ncl grate in scrics above and below tlic tran u-rsc ccnl l' f said grate, .1 dumping -ct'tioii beyond the lower end of thc t'ucl H;iporting grate. a Sitting section urrangcd ctu'ccn said dumping section and the tour-i cnd ot' the incl-supporting grate and v-oni rning stationarv and reciprocating bar the latter being connected for movement with the lowcr series of reciprrr rating t'ucl grate sections. and means for iniultancously reciprocating said upper and lou'cr scrit-s ol' rcciprocatory fuel grate see tions in opposite dire tions.

l8. In a mechanical sinker, a grate in cluding movable cction a steam power cylinder and piston, a rocl; shaft actuated thereby, a rocker arm thereon, a second rock shaft, means operated thereby for transmitt ng motion to the movable grate sections, a. crank artn carried bv said second rock shaft, :1 block pivotaltv' engaging said crank arm, a ccond lUCh't! arin having a slot on one side of its center lidably engaging said block. YHHUIH tor adju ting tln' block Within said slot. and parallel motion links connecting the rocker arms.

t). In a mechanical stoker. a grate inreciprocating t't-cdcr. a tcam pom-r cylinder and piston. arins thereon, a second rock shaft. neans operated thereby t'or transmitting motion to the movable grate sections. a third rock shaft for trans milling motion to the tender. crank arms arried bv aid second and third rock shafts, l)l it'lv' piv tall v conncctcd with said crank slotted rockcr arms receiving said block incan for adjusting the slotted arms upon thc blocks, and sets ot parallel motion linlv's connecting the respective slotted rocker arms with thc rookcr arms upon the firstnannal roclt shaft.

ti In a mechanical stokcr. a grate in rlnding movable acctiona, primary and secondary rock shafts. the latter being eonnected with the movable grate sections for transmitting motion thereto, a steam Power 0 linder and piston, a rocker arm carried by the primary rock shaft and actuated by said piston, a slotted secondary rocker arm. a crank arm carried by the secondary ruck shaft and with which said slotted rocker arm is slidably and pivotally connected for adjustment to re ulate the stroke of the secondary rock sha t, and parallel motion links connecting said rocker arms.

21. In a mechanical Stoker a grate comprising fixed sections and movable sections, said movable sections being connected in oppositely reciprocating series, a rock shaft connections between the same and said ries of movable grate sections for simultaneously reciprocating the latter in op posite directions, a crank arm carried by said rock shaft, a block pivoted thereto, a rocker arm having a slot slidably receiving said block, means for adjusting the Mock in the slot, a second rock shaft having 0pm siteiv giroitz iiing vranti arm motion Emits ccxmecting sail. with tins Mitts ot the rocker area 2:? to a mechanical stuit ll a bodying Statitillflify grate tax-thins series of om ositcly lt-lf'ililk'Ktti(/L'k t'ions. said stationery am? i a grate Lions having iiterwoiutingl grate bars, a steam power cylinder and piston a rock shaft actuated thereby parallel omtlon transmission mccnanism ogr-ermml i=3 the shaft for itipIOCitillig said reciprotatory grate sections, and mew" said trammissioz'i mechani the sax-e @"iifil'flllt'fi or ino p ing the warning atrolic there In testimony whereof e ture in presence of tare witn ss's 5Y5 RE] i. Lit I 5 lift.

C, C. Hmns, Banyan S. Jones, 

